Answer by Will.Evo for Convert fragmented MP4 to MP4

ws = create_connection(url, headers=headers)# Then send a message through the tunnelws.send('ping')start = timeit.default_timer()flag = Trueoutput = []while flag:    output.append(ws.recv())    if timeit.default_timer() - start > 90:        flag = Falseresult = output[0][8:]for msg in output[1:]:    if msg[0] == 249:        moofmdat = b''        moof = b''        continue    if msg[0] == 252:        vidbuf = msg[4:]    if msg[0] == 251:        moof += msg[4:]    if msg[0] == 254:        mdat = msg[4:]    if msg[0] == 255:        moofmdat += moof        moofmdat += mdat        moofmdat += vidbuf        result += moofmdatwith open('test.mp4', 'wb') as file:    file.write(result)

Figured it out. The MOOV header has 8 bytes of unnecessary information that must be removed. Each additional message (besides PBT_Begin and PBT_End) have 4 bytes of player specific data. Just needed to clean up each message and place in the correct order. Then save the raw bytes out as a mp4 and voila, video that plays in vlc.